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Re: [Xen-devel] [PATCH] xen: mark expected switch fall-through



On Tue, Feb 12, 2019 at 02:37:20PM -0600, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
> 
> This patch fixes the following warning:
> 
> drivers/xen/xen-pciback/xenbus.c: In function ‘xen_pcibk_frontend_changed’:
> drivers/xen/xen-pciback/xenbus.c:545:6: warning: this statement may fall 
> through [-Wimplicit-fallthrough=]
>    if (xenbus_dev_is_online(xdev))
>       ^
> drivers/xen/xen-pciback/xenbus.c:548:2: note: here
>   case XenbusStateUnknown:
>   ^~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> Notice that, in this particular case, the code comment is modified
> in accordance with what GCC is expecting to find.
> 
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

Applied to for-linus-5.0

(xen-scsiback patch too)

-boris


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